The heavy, black iron door was engraved with strange patterns, intertwined and radiating an air of profound mystery.
Kyi and the others were baffled, but Sunan recognized the patterns at a glance.
Enchantment runes!
The structure of the runes wasn't complex; they seemed to be a simple magic trap.
If anyone touched the door, it would trigger an alert and attack the intruder.
However, the runes were dim and lifeless, clearly deactivated, likely due to the erosion of time.
Even the most intricate enchantment runes couldn't withstand the relentless passage of time.
"Is that iron door the entrance to where the Iron-Swallowing Beasts are made?"
Kyi looked at Sunan, who nodded and added a warning, "Be careful, those beasts won't just let us in."
As if to echo his words, as soon as he finished speaking, Iron-Swallowing Beasts emerged from the rock walls on both sides of the door, lunging towards them with ferocious growls.
Prepared for this, the knights shouted and met the attack head-on.
Only Bradd stepped back, positioning himself in front of Sunan with his massive shield.
Having witnessed Sunan's abilities, they understood that he was their main weapon against the beasts and prioritized his safety.
Sunan chanted a strange incantation, but this time, instead of Acid Splash, he cast Mage Hand.
Ten meters away, an Iron-Swallowing Beast leaping towards Kyi suddenly froze mid-air, its limbs flailing as it struggled against the invisible force holding it.
Kyi's eyes lit up. Seizing the opportunity, he dashed forward, his sword flashing. He struck the beast's neck repeatedly, finally severing its head.
The headless beast crashed to the ground, lifeless.
Compared to the single-target Acid Splash, Mage Hand, although less powerful, had a longer duration, making it perfect for assisting Kyi in killing the beasts.
"Fortunately, low-level puppets aren't very intelligent. They don't understand the principle of killing the fragile spellcaster first. Otherwise, if they swarmed me, Bradd alone wouldn't be able to hold them off," Sunan thought to himself.
Of course, if the Iron-Swallowing Beasts weren't puppets, he wouldn't be limited to Acid Splash and Mage Hand.
A single Flash spell would blind these creatures, who were accustomed to the darkness and highly sensitive to light, rendering them helpless.
With their coordinated efforts, the Iron-Swallowing Beasts fell one after another.
As Sunan had guessed, their mission was to guard the iron door.
Therefore, despite suffering heavy casualties, they showed no signs of fleeing.
Ten minutes later, with a final crack, the last beast was cut in half, its body falling to the ground.
All twenty or so Iron-Swallowing Beasts were annihilated.
Looking at the ground littered with Blackrock Iron fragments, Kyi couldn't contain his excitement and joy.
Before coming here, he never imagined that the biggest threat of the Blackrock Mine could be eliminated so easily!
And it was all thanks to Sunan.
Looking at Sunan's back, Kyi couldn't help but sigh with emotion.
When Sunan had declared his intention to become a wizard, he had thought Sunan was being foolish, believing in the fantastical tales he read in books.
But now, not only had Sunan succeeded, but he had also become so powerful, wielding a variety of extraordinary abilities that were truly awe-inspiring.
Kyi was even a little envious.
When they returned to the castle, should he try to walk the path of a wizard as well?
Sunan, unaware of Kyi's thoughts, hurried to the iron door for a closer look.
As expected, the magic trap on the door was indeed deactivated.
He called two knights over, and together they pushed open the heavy door.
Rumble!
The door slowly opened, sending dust and debris raining down from the ceiling.
As the dust settled, the scene behind the door gradually came into view.
It was a vast hall, about four or five hundred square meters in size.
The entire hall was paved with square, grey stone bricks, covered in a thick layer of dust. There were messy footprints and what appeared to be animal tracks.
It was clear that this hall was where the Iron-Swallowing Beasts usually resided.
There were three open stone doors at the back of the hall, leading into dark, unseen chambers.
Several knights entered each chamber with their torches, ensuring there was no danger before Sunan and Kyi followed.
The first chamber appeared to be a warehouse, incredibly spacious and filled with stacks of Blackrock Iron.
Not raw ore, but refined ingots.
Everyone stared at the countless ingots, their expressions stunned.
"We've struck it rich..." Jorton muttered, his eyes glued to the Blackrock Iron, swallowing hard.
No one mocked his loss of composure; they all shared the same sentiment.
Even Kyi was dumbfounded, his face a mixture of shock, ecstasy, and disbelief.
Blackrock Iron was as hard as refined iron but much lighter, making it even more expensive.
The Blackrock Iron before them was worth a fortune, at least six or seven thousand gold coins.
This was almost equivalent to ten years of tax revenue for Blackrock City!
How could such a windfall not make them ecstatic?
Only Sunan wasn't overly fixated on the gold. Although surprised, he quickly regained his composure and moved on to the next chamber.
The second chamber was slightly smaller, filled with various tools, including a blacksmithing furnace, molds, and even a bellows.
However, the most eye-catching object was the massive stone table in the center of the room, over three meters long and nearly two meters wide.
It was covered in messy cut marks.
Sunan glanced at the pile of Blackrock Iron in the corner and immediately understood.
This was likely the laboratory where the wizard apprentice had created the puppets.
He had already ruled out the possibility of the owner being a formal wizard.
Both the strength of the Iron-Swallowing Beasts and the level of the magic trap on the door indicated that the owner was at most a wizard apprentice, far from reaching the level of a formal wizard.
If it were a formal wizard, they wouldn't have been able to get past the guardians and enter this place.
With these thoughts in mind, Sunan quickly searched the entire room.
To his disappointment, apart from the tools and ingots, he found nothing else of value.
Shaking his head, he left the room and entered the third chamber.
Compared to the previous two, this chamber was smaller but more comfortably furnished. In addition to a small bed and a desk, there was also a bookshelf, indicating that this was a study.
Sunan's gaze fell on the bookshelf filled with books, his eyes lighting up.
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